begin

Required Stages: vertex (.vsh), fragment (.fsh)
Optional Stages: geometry (.gsh), compute (.csh)
Output Buffers: colortex
Valid Suffixes: N/A, 1-99

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An Iris exclusive composite pass that runs before the shadow pass. It’s intended to be used for setting up any data that is needed for the shadow pass. Like other composite programs, it renders a single fullscreen quad over the resolution of the buffer(s) it writes to.